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Glossary
© National Instruments Corporation G-3 USB-8486 for Windows
Directory A structure for organizing files into convenient groups. A directory is
like an address showing where files are located. A directory can
contain files or subdirectories of files.
DLL See Dynamic Link Library.
Driver Device driver software installed within the operating system.
Dynamic Link Library A library of functions and subroutines that links to an application at
run time.
E
EMI Electromagnetic interference.
Event An occurrence on a device that causes a Fieldbus entity to send the
Fieldbus event message.
F
Field device A Fieldbus device connected directly to a Fieldbus.
Fieldbus An all-digital, two-way communication system that connects control
systems to instrumentation. A process control local area network
defined by ISA standard S50.02.
Fieldbus cable Shielded, twisted pair cable made specifically for Fieldbus that has
characteristics important for good signal transmission and are within
the requirements of the Fieldbus standard.
Fieldbus Foundation An organization that developed a Fieldbus network specifically based
upon the work and principles of the ISA/IEC standards committees.
Fieldbus Messaging
Specification The layer of the communication stack that defines a model for
applications to interact over the Fieldbus. The services FMS provides
allow you to read and write information about the OD, read and write
the data variables described in the OD, and perform other activities
such as uploading/downloading data and invoking programs inside
a device.
Fieldbus Network Address Location of a board or device on the Fieldbus; the Fieldbus node
address.
FMS See Fieldbus Messaging Specification.
F
OUNDATION™
Fieldbus
specification
The communications network specification that the Fieldbus
Foundation created.